GN: Mojo wget, sample_app, surfaces app and component build

mojo/services/surfaces/BUILD.gn

Index: mojo/services/surfaces/BUILD.gn
diff --git a/mojo/services/surfaces/BUILD.gn b/mojo/services/surfaces/BUILD.gn
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+# Copyright 2014 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//mojo/system.gni")
+
+# GYP version: mojo/mojo_services.gypi:mojo_surfaces_service
+shared_library("surfaces") {
+  output_name = "mojo_surfaces_service"
+
+  deps = [
+    "//base",
+    "//cc",
+    "//cc/surfaces",
+    "//ui/gfx/geometry",
+    "//mojo/environment:chromium",
+    "//mojo/public/cpp/application:chromium",
+    "//mojo/cc",
+    "//mojo/services/public/interfaces/geometry",
+    "//mojo/services/public/interfaces/surfaces",
+    "//mojo/services/public/cpp/geometry",
+    "//mojo/services/public/cpp/surfaces",
+    "//mojo/public/cpp/application:main_chromium",
+  ] + mojo_gles2_for_shared_library + mojo_system_for_shared_library
+
+  sources = [
+    "surfaces_impl.cc",
+    "surfaces_impl.h",
+    "surfaces_service_application.cc",
+    "surfaces_service_application.h",
+  ]
+}